Grease-gun



1.]. RISCHARD.

GREASE GUN.

APPLICATION FILED AUG-4, I919.

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Patented Feb. 15, 1921.

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A TTORNEYS hurra stares Pl lTlElhlT JOSEPHJ. RISCHARD, 0F PASADENA, CALIFORNIA.

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To mll 'whomit may concern:

Be it known that I, JOSEPH J. RISGHARD, a citizen of the United States, residing at Pasadena, in the county of Los Angeles and State of California, have invented new and useful Improvements in Grease- Guns, of which the following is a specification.

My object is to make an improved grease gun, and my invention consists of the novel features herein shown, described and claimed.

Figure 1 is a sectional elevation of a grease gun embodying the principles of my invention.

Fig. 2 is an enlarged sectional detail on the line 2-2 of Figs. 1 and 3.

Fig. 3 is a cross sectional detail on the line 33 of, Figs. 1 and 2.

The large pump cylinder 1 has a cap 2 fixed upon its lower end and a cap 3 removably mounted upon its upperend. A piston rod 4 is mounted through a stuffing box 5 in the cap 3. A piston 6' is fixed upon the lower end of the piston rod 4 and is operatively mounted in the cylinder 1.

The cap 3 has a bayonet slot 7 extending from its lower edge and a pin 8 is fixed in the cylinder 'l in position to enter the slot 7 and lock the cap 3 upon the cylinder 1. A handle 9 is fixed upon the upper end of the piston rod 4.

A small pump cylinder 10 is connected to the pump cylinder 1 near their upper ends by a pipe 11 and near their lower ends by a pipe 12. A valve seat 13 is fixed 1n the end of the pipe 12 near the small cylinder .10. Supports 14 and 14 extend across the pipe 12. A valve 15 fits the valve seat 13 and a valve stem 16 is connected to the valve 15 and extends through hearings in the supports 14 and 14*. A spring seat 17 is fixed" upon the stem 16, and an extension coil spring 18 is mounted upon the stem 16 between the seat 17 and the support 14 so as to make a check valve whichwill open under pressure from the bottom of the large cylinder 1 and which will close under pressure .from the bottom of the small cylinder 10.

A piston 10 is mounted in the small cylinder 10, a piston rod 20 being connected to the piston 19 and extendingthrough the cap 21 screwed upon the upper end of the cylinder 10. A handle 22 is fixed upon the upper end of the piston rod 20, and a cap 23 is screwed upon the lower ,end of the cylinder 10. A spout 24 extends downwardly from the cap Specification of Letters Patent. Pafi g mlggfl Fgb 15 11921 Application filed August 4, I

1919. Serial No. 315.281.

placed with the piston 6 on top of the lubricant. Then the handle 22 is operated to pull the piston 19 upwardlyand the handle 9 op erated to press the iston 6 downwardly to force the lubricant t rough the pipe'12 into the cylinder 10 below the piston 19. The end of the spout 24 may then be placed in the grease cup, the handle 22 being operated to move the piston 19 downwardly when the lubricant will be forced through the spout 24, and if it is desired to expel all of the lubricant the piston 19 may be forced downwardly until the plunger 25 fills the spout 24. If desired, the piston 19 may be raised .to a point above the pipe 11 and the cylinders l and 10 may be filled at the same time. The check valve in the pipe 12 holds the lubricant from running back into the cylinder 1. The handle!) may be depressed to vforce the lubricant through the pipe 12' and then the handle 22 operated to expel the lubricant from the spout 24. The quantity may be regulated by accurately ingrthe handles 9 and 22.

, arious-changes may be made without departing from the spirit of my invention as claimed.

I claim;

1. A grease un comprisin a large cylinder; a piston in the large cyl inder a small manipulatcylinder, a piston in said small cylinder, a

pipe connecting the lower end of said cylinders, a check valve in said pipe to prevent the grease from passing from said small cylinder into said large cylinder, and a spout projecting from the lower end of said small cylinder.

4. A grease gun including a large cylinder,-a small cylinder, a piston in said large cylinder, a piston in said small cylinder, a pipe connecting the lower end of said cylinders, a spout leading from the lower end of said small cylinder, and a plunger on the piston in said small cylinder for projectinginto said spout.

5. A ease gun including a large cylinder, a plston in said largecylinder, a'small cylinder, a piston in said small cylinder, a-

pipe connecting the lower end of said cylinders, a'check valve in said pipe to prevent the grease" from passing from said small cylinder into said large cylinder, a spout 15 projecting from the lower end of said small cylinder, and aplunger on the piston in said small cylinder for projectin into said spout.

In testimony whereof I ave signed my name tothis specification.

7 J08. 'JLRISGHARD. 

